<template>
	<el-image
		:src="`${realSrc}`"
		fit="cover"
		:style="`width:${realWidth};height:${realHeight};`"
		:preview-src-list="realSrcList"
	>
		<div slot="error" class="image-slot">
			<i class="el-icon-picture-outline"></i>
		</div>
	</el-image>
</template>

<script>
    import { isExternal } from '@/utils/validate';

    export default {
        name: 'ImagePreview',
        props: {
            src: {
                type: String,
                required: true
            },
            width: {
                type: [Number, String],
                default: ''
            },
            height: {
                type: [Number, String],
                default: ''
            }
        },
        computed: {
            realSrc() {
                const real_src = this.src.split(',')[0];
                if (isExternal(real_src)) {
                    return real_src;
                }
                return process.env.VUE_APP_BASE_API + real_src;
            },
            realSrcList() {
                const real_src_list = this.src.split(',');
                const srcList = [];
                real_src_list.forEach(item => {
                    if (isExternal(item)) {
                        return srcList.push(item);
                    }
                    return srcList.push(process.env.VUE_APP_BASE_API + item);
                });
                return srcList;
            },
            realWidth() {
                return typeof this.width === 'string' ? this.width : `${this.width}px`;
            },
            realHeight() {
                return typeof this.height === 'string' ? this.height : `${this.height}px`;
            }
        }
    };
</script>

<style lang="scss" scoped>
.el-image {
  border-radius: 5px;
  background-color: #ebeef5;
  box-shadow: 0 0 5px 1px #ccc;
  ::v-deep .el-image__inner {
    transition: all 0.3s;
    cursor: pointer;
    &:hover {
      transform: scale(1.2);
    }
  }
  ::v-deep .image-slot {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    color: #909399;
    font-size: 30px;
  }
}
</style>
